¹ Straight translation: Denn Baby glaub mir das Beste bist du = ‚cause baby (trust/believe) me, the best is you. “Beste” used as a noun means “best one,” or “pick of the bunch.” Instead of using “is you,” which in English is clumsy, I chose to use “that’s you.” as that’s how it would be said in English. "You're the best" can also be said.
² zerbrech mir den Kopf = to wrack your brains = to think hard; depending on where you look, the spelling varies on the word wrack and rack.http://www.thefreedictionary.com/rack+brains
³ German saying: Was bringt mir das? = what does that do for me?
⁴ the first three lines of this verse have been rearranged to accommodate the English language.
⁵ und alles dreht sich um sich selbst: this is a little confusing in English, but is similar to the English expression:“everything revolves around you.” In this context, it means everything revolves around “you” “me,” “the tree,” and everything else.